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Dmitrij [34]
3 years ago
9

Three PCs are on an Ethernet LAN, connected by a hub. Describe how the Ethernet protocol deals with collisions in this situation

. How would the situation change if the hub were replaced by a switch?
Computers and Technology
1 answer:
sdas [7]3 years ago
3 0

Answer:

All the ports in a hub are in the same collision domain and a hub sends frames from one host to all other hosts in the network. This makes it prone to collision and poor network throughput. Just like a network switch, it uses the CSMA/CD protocol to detect collision in its network.

A network switch reduces its collision domain to just a port and sends frames from one host to another using its mac table as a route. This makes the network very efficient with high throughput. It also uses the CSMA/CD protocol to detect collision

Explanation:

Switches and hubs are used in networking to connect computer devices in a network. A hub is an obsolete device networking that broadcast a frame to all other ports or host in the network except for the send host port. This increases the rate of collision as all the ports in a hub share the same collision domain. A switch is an efficient frame switching device in a network, which uses its MAC table to decide and find a destination host.

CSMA/CD is a collision detection protocol used in a network to detect and prevent a collision. With this protocol, a host is able to listen, wait, send and resend frames to prevent a collision.

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Implement function hex2dec that takes a hex number hex_num as a string argument and prints out the corresponding decimal number.
DerKrebs [107]

Answer:

Check the explanation

Explanation:

#include <iostream>

using namespace std;

void hex2dec(string hex_num){

int n = 0;

//Loop through all characters in string

for(int i=0;i<hex_num.size();i++){

//take ith character

char c = hex_num[i];

//Check if c is digit

if(c>='0' && c<='9'){

n = 16*n + (c-48);

}

//Convert c to decimal

else{

n = 16*n + (c-55);

}

}

cout<<hex_num<<" : "<<n<<endl;

}

int main()

{

hex2dec("EF10");

hex2dec("AA");

return 0;

}

The Output can be seen below :

4 0
3 years ago
Which statement does not describe the guidelines for the use of text in presentation programs?
olganol [36]
Choice a
have a great day

7 0
3 years ago
The Chairman of the Federal Reserve &amp; the Federal Open Market Committee determine the percentage of a deposit which must be
Scrat [10]
Required Deposit Reserve
6 0
3 years ago
Edhesive assignment 7 calendar
ikadub [295]

Answer:

def leap_year(y):

 if y % 4 == 0:

     return 1

 else:

     return 0

def number_of_days(m,y):

 if m == 2:

     return 28 + leap_year(y)

 elif m == 1 or m == 3 or m == 5 or m == 7 or m == 8 or m ==10 or m == 12:

     return 31

 elif m == 4 or m == 6 or m == 9 or m == 11:

     return 30

def days(m,d):

 if m == 1:

     return 0 + d

 if m == 2:

     return 31 + d

 if m == 3:

     return 59 + d

 if m == 4:

     return 90 + d

 if m == 5:

     return 120 + d

 if m == 6:

     return 151 + d

 if m == 7:

     return 181 + d

 if m == 8:

     return 212 + d

 if m == 9:

     return 243 + d

 if m == 10:

     return 273 + d

 if m == 11:

     return 304 + d

 if m == 12:

     return 334 + d

def days_left(d,m,y):

 if days(m,d) <= 60:

     return 365 - days(m,d) + leap_year(y)

 else:

     return 365 - days(m,d)

print("Please enter a date")

day=int(input("Day: "))

month=int(input("Month: "))

year=int(input("Year: "))

choice=int(input("Menu:\n1) Calculate the number of days in the given month.\n2) Calculate the number of days left in the given year.\n"))

if choice == 1:

 print(number_of_days(month, year))

if choice == 2:

 print(days_left(day,month,year))

Explanation:

Hoped this helped

5 0
3 years ago
What is the space complexity of the algorithm?ArithmeticSeries(list, listSize) { i = 0 arithmeticSum = 0 while (i &lt; listSize)
blondinia [14]

Answer:

O(n) which is a linear space complexity

Explanation:

Space complexity is the amount of memory space needed for a program code to be executed and return results. Space complexity depends on the input space and the auxiliary space used by the algorithm.

The list or array is an integer array of 'n' items, with the memory size 4*n, which is the memory size of an integer multiplied by the number of items in the list. The listSize,  i, and arithmeticSum are all integers, the memory space is 4(3) = 12. The return statement passes the content of the arithmetic variable to another variable of space 4.

The total space complexity of the algorithm is "4n + 16" which is a linear space complexity.

7 0
2 years ago
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